RegisterLoginThursday, March 05, 2015

Want to know what's up in the sky this week? Check out SkyLights

Scout or Guide group?  We offer year round programs for Scout and Guide groups to help earn your Astronomy Badge.  Contact us at  for more information.

We welcome school groups and special events year-round. Our programs meet Ontario curriculum requirements and they're fun!  Contact us at  for more information.

   Be a friend of the DDO on Facebook!

You'll find out what's new in space, sci-fi and right here at the DDO. Get regular updates on DDO happenings by clicking here.



Our 2015 season starts in May. We'll be posting our event schedule at the beginning of April. We hope you'll join us!

Ready to explore the universe? Start your journey at the David Dunlap Observatory, home of Canada's largest optical telescope with a mirror measuring more than six feet (74") in diameter. Constructed in the 1930s,  the Observatory is located in the heart of Richmond Hill, Ontario. 

Throughout our regular season, join us for an evening of telescope observing, space crafts, space talks and tours. On program nights we check out a wide variety of celestial objects, including the Moon, Jupiter, Mars, Saturn and more.


The David Dunlap Observatory is home to a wide range of public viewing nights, special events and educational programs. Visiting the 23-ton Great Telescope is an awe-inspiring experience. 

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